/// VAEA Flash — Auto Slippage Calculator (Rust)
///
/// Calculates optimal slippage for direct flash loan routes.
/// Uses data from our own QuoteResponse — zero external API calls.
/// Slippage mode: auto, aggressive, safe, or exact bps.
/// Calculate optimal slippage in bps for a flash loan.
///
/// # Arguments
/// * `mode` — Slippage mode